Operating display panel



FIG. 1 is a top front perspective view of our new design for an operating display panel;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines showing particular elements of the operating display panel are included for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an operating display panel, as shown and described. 